9901022212111 has 2 divisors, whose sum is σ = 9901022212112. Its totient is φ = 9901022212110.

The previous prime is 9901022212093. The next prime is 9901022212121. The reversal of 9901022212111 is 1112122201099.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9901022212111 - 2¹⁷ = 9901022081039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9901022212121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4950511106055 + 4950511106056.

It is an arithmetic number, because the mean of its divisors is an integer number (4950511106056).

Almost surely, 2^{9901022212111} is an apocalyptic number.

9901022212111 is a deficient number, since it is larger than the sum of its proper divisors (1).

9901022212111 is an equidigital number, since it uses as much as digits as its factorization.

9901022212111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 9901022212111 in words is "nine trillion, nine hundred one billion, twenty-two million, two hundred twelve thousand, one hundred eleven".